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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 430 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.61 × 8 =
  2. 2.33 × 8 =
  3. 3.13 × 4 =
  4. 4.31 × 8 =
  5. 5.151 × 4 =
  6. 6.17 × 8 =
  7. 7.43 × 4 =
  8. 8.151 × 4 =
  9. 9.27 × 8 =
  10. 10.38 × 4 =
  11. 11.73 × 4 =
  12. 12.38 × 8 =
  13. 13.142 × 4 =
  14. 14.31 × 8 =
  15. 15.37 × 8 =
  16. 16.39 × 4 =
  17. 17.120 × 4 =
  18. 18.39 × 8 =
  19. 19.29 × 8 =
  20. 20.47 × 8 =
  21. 21.42 × 4 =
  22. 22.79 × 4 =
  23. 23.40 × 8 =
  24. 24.61 × 8 =
  25. 25.122 × 4 =
  26. 26.147 × 4 =
  27. 27.29 × 8 =
  28. 28.63 × 4 =
  29. 29.37 × 4 =
  30. 30.33 × 8 =
  31. 31.49 × 4 =
  32. 32.26 × 8 =
  33. 33.68 × 8 =
  34. 34.101 × 4 =
  35. 35.30 × 8 =
  36. 36.67 × 8 =
  37. 37.74 × 8 =
  38. 38.144 × 4 =
  39. 39.157 × 4 =
  40. 40.140 × 4 =

Answer key

  1. 488
  2. 264
  3. 52
  4. 248
  5. 604
  6. 136
  7. 172
  8. 604
  9. 216
  10. 152
  11. 292
  12. 304
  13. 568
  14. 248
  15. 296
  16. 156
  17. 480
  18. 312
  19. 232
  20. 376
  21. 168
  22. 316
  23. 320
  24. 488
  25. 488
  26. 588
  27. 232
  28. 252
  29. 148
  30. 264
  31. 196
  32. 208
  33. 544
  34. 404
  35. 240
  36. 536
  37. 592
  38. 576
  39. 628
  40. 560

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